Heater for steam and water



(-No Model.) 2 Sheets-Sheet 1.

' A. HOLT.

HEATER FOR STEAM AND WATER. w i No 291,347. A Patented Jan. 1', 1 884.

(No Model.) I 2 Sheets-Shet 2.

I A HOLT.

HEATER FOR STEAM AND WATER.

Patented. Jantl; 18841.;

ATES

rENr elm ALDEN HOLT, or OSTON, MASSACHUSETTS.-

HEATER 'FORESTEAM, AND WATER.

" SPECIFICATION forming part of Lettersjatent No. 291,347, dated January 1884.

Applicationjfil cd August 17, l883. (N model.)

To cqZZ whom it may concern.-

- Be it known that I, ALDEN. HOLT, a citizen 3 of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts,

' have invented certain new and usefullmprovements in Heaters for Steam and \Vatenof which the following is aspecificatiomreference being therein to the accompanying drawings.

Figurel is a front elevation of an apparatus IO containing a heater embodying my improve ments.- Fig. 2 is a transverse section. Fig.

3 is a longitudinal section. Fig. 4 isa rear elevation. i e A In the drawings, A represents the chamber,

i 5 in which is inclosed the furnace and boiler apparatus, said chamber being formed by means of brick-work, the walls of which are preferably constructed relatively to'each other in p the manner shown that is to say,it is formed 3 with vertical side walls, A A, end walls, A

l A, and a top, A. j, i Inside of the sidewalls, A, there are supplemental low walls B B, of brickwork, for the purpose of supporting the grate and other parts of. the fire-box proper, and also supporting other parts, to behereinaiter described.

The fire-box or furnace proper may be constructedin any suitable way, though I prefer that shownthat is I to say, at 0 there is a grate, below which a chamber, 0, is left to receive the ashes. chamber there is an iron plate, D, for supporting the doors, this plate and thedoors being of anysuitable or preferred construction.

The apparatus in which the water is heated and the steam is generated is constructed and supported as follows: i i

- E E represent angular water-boxes, one of which is arranged upon each side of the fur- 0 nace. Each ofthese is formed with a clownwardly-projecting or vertically-arranged part,

E, and an outwardly and upwardlyinclined part, E, both being cast in one piece, The part E rests upon the wall B or upon pieces 5 of fire-brick, e, interposed between said partE and said wall. The part E of the water-box is provided with a number of threaded apertures in the upper wall, e, adapted to receive the lower ends of the water-tubes. The upper part of the heater consists of a dome portion, preferably about semi-cylindrical in shape, as represented at F, and a lower h In In the front wall of the" of flanges f and f, one carried by the upper and the other by the lower part, t-hcre being bolts which secure the flanges firmly together to form a water-tight and steam-tight joint.

The lower part, F, has inclined walls Ill F which are parallel to the upper walls, 6 c, of 6c the water-boxes. E E. These inclined walls F F? are provided withapertures, in which fit the upper ends, of the water-pipes. These latter are represented by G G, being sorew threaded at their lower ends to fit the apertures E E, which are also threaded, and at the upper ends the tubes are expanded within and above the apertures in the plates F so that a water-tight and steam-tight joint is produced; By securing the parts of the heater together in this way, I can make it much more easily, and therefore it is muchtcheaper than when the parts are fitted together in the ways heretofore employed. It will be seen that ac-' oess can be readily had to the interior of the upper receptacle, for when the partsthereof are separateda large opening is given to the lower part, so that tools and implements can be easily introduced for expanding the upper ends of, the inclined tubes. Any suitable number of these heatingtubes G may be used,

though for ordinary purposes it will be found .that three rows on each side of the furnace are sufficient, those of the middle row being arranged to alternate with those of the inner and the outer rows. The portion F of the heater is at the lower part formed with a down-' wardly-extended drum, F preferably of about the character shown-that is to say, semicin cular in section on the under side, and with inwardly-extended walls f f.

In order to cut off the upper portion of the upper receptacle from the influence both of the external air and ofthe products of combustion, I form upon the sides thereof deadair chambers, these being produced by means ofwalls ofnon-conducting material--such as bricks M-supported upon metallic plates L, which, in turn, at their upper end are su'pported against the upper receptacles, and at their lower ends are supported upon flanges 6*, cast, with their lower receptacles, E E. These walls separate the space within thecas" inginto three compartments, two of which The upper and are filled with. dead air. At the rear ends the waterboxes E E are united with the water-drum F, above described, by means of a tubular connection, which is shown in the drawings to consist of tubes H H, the tube II communicating with the drum F" and with the tube H, which latter at the end communicates with the boxes E E. The water may be introduced in any suitable way to the interior of the heater, as by pipe H, and the steam may be conducted away therefrom in any preferred way. I11 the drawings I have shown the steam as passing out of the dome part F at each end through pipes or tubes I, which the. radiator, or to whatever point it is desired communicate with the tubes 1 1*, that go to to conduct them to. With these parts may be combined a gage, as shown at J, the tube which supplies the gage connectingwith the water-box E E by a branch tube, j, and communicating also with the steam-passage by means of a top branch tube, j

I am aware of the fact that use has been heretofore made of two sets of inclined tubes arranged to converge upwardly, they having been employed in combination with boilers and heating apparatus of various styles, and

.I do not broadly claim heating-tubes so arranged as my invention; but a construction of the character of mine possesses many advantages over those which have been heretofore in use, especially for the purpose for which my construction is mainly intendedto wit, the providing of heat for buildings by means of steam-and in most cases but little room is available, and the heater must be furnished at the lowest possible cost. The constructions heretofore in use have been of such nature as to occupy much room, and as to necessitate considerable expense. Thus in one form of steam-generator heretofore employed use has been made of two sets of inclined tubes, at the upper ends united to a series of separate pipes or tubes, each provided with tubular inclined extensions to respectively receive the upper end of one of the inclined tubes, and at the lower ends united to two rows of inclined pipes or tubes, each situated at an angle to the horizon, and having tubular extensions to respectively fit the end of one of the inclined tubes. A construction of the sort last described is far more diiiicult to make and more expensive than mine. By casting the chamber F F in substantially the manner shown-that is to say, so that it shall be not properly a tube, but a comparatively largemctal compartment, having the inclined walls F F extending from end to end, and by having each of the lower receptacles, E E, in substantially the form shown-that is to say, with a bottom supporting-leg, E, and an upper inclined chamber, E, with walls parallel shall be exposed to a large extent of heatingrfa A steam-generator of another style has been kn own, having round water-receptacles at the bottom, two sets of inclined tubes, and at the top two separate round tubes, each communicating from end to end with one of the series of inclined tubes. My heater is, however, more advantageous for the purposes for which it is intended than are those of this last-mentioned character, as the tubes cannot be socured at their upper and lower ends to receptacles which are circular in cross-section as readily and cheaply as they can be secured to the cast boxes which I have shown and described.

By threading one end of each tube and secur ng said end in the lower box, the at t&Ch-

ment can be readily effected, and by having the upper receptacle formed in two parts.

(which can be separated and leave a large opening for the lower part) access can be readilyhad to the upper end of each tube for the purpose of expanding it and producing a tight joint; but when the receptacles are so constrncted that there is not easy access to the;

interior, it is difficult to securely join the ends of the tubes to the receptacles.

\Vh'at .I claim i s 1. In a heater for steam or water, the combination of an upper receptacle for water andsteam, having the steam-dome portion F and the lower portion, F, cast with downwardlyeonverging plates or walls F having long} tudinal series of tube-apertures, said portions F and F being cast separately and bolted together, the lower receptacles, E E, each having the tight lower portion, E, cast integrally with the part E, both extending from one end to the other of the heater, and each part E having a wall or plate, 0, parallel with one of the walls F, and the tubes G, having their ends secured in said parallel plates or walls, substantially as set forth.

2. In a heater for steam or water, the combination of the upper receptacle, F F, two sets of inclined downwardly converging steam.- tubes, both sets communicating with said receptacle F F, the receptacles E E at lower points, each connecting all of the tubes of one set, the outer masonry casing around the heater, the smoke-flue communicating with the,

heating-chamber at or near the upper horizontal plane of the heating-tubes, and the i terior supplemental masonry walls, M, above the smoke-flue, and extending from the upperreceptacle, F F, to the lower receptacles, respectively, whereby the products of combustion are prevented from rising above said tubes, and dead-air chambers are formed around the upper portion of the heater, substantially as set forth, I I

3. The combination of the lower receptacles, E E, having the flatupwardly-inclined plates 6" extending from end to endof the heater, the inclined tubes Gr, fitting into the,

receptacles E, and the upper receptacle for water and steam, having the lower part, F, cast with the Walls F inclined to be parallel with the walls 6, and the steam-dome F, cast separately from and bolted to the lower part 5 F, substantially as described and shown, and the outer casing which surrounds the aforesaid parts, substantially as set forth.

4:. The combination of the upper receptacle for steam and water, the lower receptacles, E 10 E, each having an upwardly-extended flange, e inclined tubes arranged in two upwardlyconverging sets, and the bricks or masonry M, resting at the bottom on the flanges e and at the top against the upper receptacle, substantially as set forth. 15 In testimony whereof I afflx my sig nature'in presence of two Witnesses.

ALDEN H OLT. Witnesses:

GEO. H. KINGSBURY, S. SANBORN. 

